2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
11 #include <sys/ioctl.h>
12 #include <sys/mount.h>
13 #include <sys/socket.h>
18 static void copy_stat(struct uml_stat *dst, const struct stat64 *src)
20 *dst = ((struct uml_stat) {
21 .ust_dev = src->st_dev, /* device */
22 .ust_ino = src->st_ino, /* inode */
23 .ust_mode = src->st_mode, /* protection */
24 .ust_nlink = src->st_nlink, /* number of hard links */
25 .ust_uid = src->st_uid, /* user ID of owner */
26 .ust_gid = src->st_gid, /* group ID of owner */
27 .ust_size = src->st_size, /* total size, in bytes */
28 .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */
29 .ust_blocks = src->st_blocks, /* number of blocks allocated */
30 .ust_atime = src->st_atime, /* time of last access */
31 .ust_mtime = src->st_mtime, /* time of last modification */
32 .ust_ctime = src->st_ctime, /* time of last change */
36 int os_stat_fd(const int fd, struct uml_stat *ubuf)
41 CATCH_EINTR(err = fstat64(fd, &sbuf));
46 copy_stat(ubuf, &sbuf);
50 int os_stat_file(const char *file_name, struct uml_stat *ubuf)
55 CATCH_EINTR(err = stat64(file_name, &sbuf));
60 copy_stat(ubuf, &sbuf);
64 int os_access(const char *file, int mode)
68 amode = (mode & OS_ACC_R_OK ? R_OK : 0) |
69 (mode & OS_ACC_W_OK ? W_OK : 0) |
70 (mode & OS_ACC_X_OK ? X_OK : 0) |
71 (mode & OS_ACC_F_OK ? F_OK : 0);
73 err = access(file, amode);
80 /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */
81 int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg)
85 err = ioctl(fd, cmd, arg);
92 /* FIXME: ensure namebuf in os_get_if_name is big enough */
93 int os_get_ifname(int fd, char* namebuf)
95 if (ioctl(fd, SIOCGIFNAME, namebuf) < 0)
101 int os_set_slip(int fd)
106 if (ioctl(fd, TIOCSETD, &disc) < 0)
110 if (ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
116 int os_mode_fd(int fd, int mode)
120 CATCH_EINTR(err = fchmod(fd, mode));
127 int os_file_type(char *file)
132 err = os_stat_file(file, &buf);
136 if (S_ISDIR(buf.ust_mode))
138 else if (S_ISLNK(buf.ust_mode))
139 return OS_TYPE_SYMLINK;
140 else if (S_ISCHR(buf.ust_mode))
141 return OS_TYPE_CHARDEV;
142 else if (S_ISBLK(buf.ust_mode))
143 return OS_TYPE_BLOCKDEV;
144 else if (S_ISFIFO(buf.ust_mode))
146 else if (S_ISSOCK(buf.ust_mode))
148 else return OS_TYPE_FILE;
151 int os_file_mode(const char *file, struct openflags *mode_out)
155 *mode_out = OPENFLAGS();
157 err = access(file, W_OK);
158 if (err && (errno != EACCES))
161 *mode_out = of_write(*mode_out);
163 err = access(file, R_OK);
164 if (err && (errno != EACCES))
167 *mode_out = of_read(*mode_out);
172 int os_open_file(const char *file, struct openflags flags, int mode)
176 if (flags.r && flags.w)
195 fd = open64(file, f, mode);
199 if (flags.cl && fcntl(fd, F_SETFD, 1)) {
208 int os_connect_socket(const char *name)
210 struct sockaddr_un sock;
213 sock.sun_family = AF_UNIX;
214 snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name);
216 fd = socket(AF_UNIX, SOCK_STREAM, 0);
222 err = connect(fd, (struct sockaddr *) &sock, sizeof(sock));
236 void os_close_file(int fd)
241 int os_seek_file(int fd, unsigned long long offset)
243 unsigned long long actual;
245 actual = lseek64(fd, offset, SEEK_SET);
246 if (actual != offset)
251 int os_read_file(int fd, void *buf, int len)
253 int n = read(fd, buf, len);
260 int os_write_file(int fd, const void *buf, int len)
262 int n = write(fd, (void *) buf, len);
269 int os_sync_file(int fd)
278 int os_file_size(const char *file, unsigned long long *size_out)
283 err = os_stat_file(file, &buf);
285 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
290 if (S_ISBLK(buf.ust_mode)) {
294 fd = open(file, O_RDONLY, 0);
297 printk(UM_KERN_ERR "Couldn't open \"%s\", "
298 "errno = %d\n", file, errno);
301 if (ioctl(fd, BLKGETSIZE, &blocks) < 0) {
303 printk(UM_KERN_ERR "Couldn't get the block size of "
304 "\"%s\", errno = %d\n", file, errno);
308 *size_out = ((long long) blocks) * 512;
311 else *size_out = buf.ust_size;
316 int os_file_modtime(const char *file, unsigned long *modtime)
321 err = os_stat_file(file, &buf);
323 printk(UM_KERN_ERR "Couldn't stat \"%s\" : err = %d\n", file,
328 *modtime = buf.ust_mtime;
332 int os_set_exec_close(int fd)
336 CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC));
343 int os_pipe(int *fds, int stream, int close_on_exec)
345 int err, type = stream ? SOCK_STREAM : SOCK_DGRAM;
347 err = socketpair(AF_UNIX, type, 0, fds);
354 err = os_set_exec_close(fds[0]);
358 err = os_set_exec_close(fds[1]);
365 printk(UM_KERN_ERR "os_pipe : Setting FD_CLOEXEC failed, err = %d\n",
372 int os_set_fd_async(int fd)
376 flags = fcntl(fd, F_GETFL);
380 flags |= O_ASYNC | O_NONBLOCK;
381 if (fcntl(fd, F_SETFL, flags) < 0) {
383 printk(UM_KERN_ERR "os_set_fd_async : failed to set O_ASYNC "
384 "and O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
388 if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
389 (fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
391 printk(UM_KERN_ERR "os_set_fd_async : Failed to fcntl F_SETOWN "
392 "(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
399 int os_clear_fd_async(int fd)
403 flags = fcntl(fd, F_GETFL);
407 flags &= ~(O_ASYNC | O_NONBLOCK);
408 if (fcntl(fd, F_SETFL, flags) < 0)
413 int os_set_fd_block(int fd, int blocking)
417 flags = fcntl(fd, F_GETFL);
422 flags &= ~O_NONBLOCK;
426 if (fcntl(fd, F_SETFL, flags) < 0)
432 int os_accept_connection(int fd)
436 new = accept(fd, NULL, 0);
454 int os_shutdown_socket(int fd, int r, int w)
467 err = shutdown(fd, what);
473 int os_rcv_fd(int fd, int *helper_pid_out)
476 char buf[CMSG_SPACE(sizeof(new))];
478 struct cmsghdr *cmsg;
483 iov = ((struct iovec) { .iov_base = helper_pid_out,
484 .iov_len = sizeof(*helper_pid_out) });
487 msg.msg_control = buf;
488 msg.msg_controllen = sizeof(buf);
491 n = recvmsg(fd, &msg, 0);
494 else if (n != iov.iov_len)
495 *helper_pid_out = -1;
497 cmsg = CMSG_FIRSTHDR(&msg);
499 printk(UM_KERN_ERR "rcv_fd didn't receive anything, "
500 "error = %d\n", errno);
503 if ((cmsg->cmsg_level != SOL_SOCKET) ||
504 (cmsg->cmsg_type != SCM_RIGHTS)) {
505 printk(UM_KERN_ERR "rcv_fd didn't receive a descriptor\n");
509 new = ((int *) CMSG_DATA(cmsg))[0];
513 int os_create_unix_socket(const char *file, int len, int close_on_exec)
515 struct sockaddr_un addr;
518 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
523 err = os_set_exec_close(sock);
525 printk(UM_KERN_ERR "create_unix_socket : "
526 "close_on_exec failed, err = %d", -err);
529 addr.sun_family = AF_UNIX;
531 snprintf(addr.sun_path, len, "%s", file);
533 err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
540 void os_flush_stdout(void)
545 int os_lock_file(int fd, int excl)
547 int type = excl ? F_WRLCK : F_RDLCK;
548 struct flock lock = ((struct flock) { .l_type = type,
549 .l_whence = SEEK_SET,
554 err = fcntl(fd, F_SETLK, &lock);
559 err = fcntl(fd, F_GETLK, &lock);
565 printk(UM_KERN_ERR "F_SETLK failed, file already locked by pid %d\n",
572 unsigned os_major(unsigned long long dev)
577 unsigned os_minor(unsigned long long dev)
582 unsigned long long os_makedev(unsigned major, unsigned minor)
584 return makedev(major, minor);